I actually really used to like Adventure time but then it completely dropped off the map for me until the finale and then I forgot about it again.
I was 100% into it when it first came out. I'm not even sure if it was airing in the UK at the time but I pirated it off some random guy's jwplayer(?) website (Sidenote: Anyone here remember AllSP for South Park?). It was the right thing at the right time for me: Some young teenage blondie fighting things and trying to get with girls waay too old for him. All set in a fantasy world filled with crass humour and computer game references.
It completely differentiated itself from its contemporaries and would soon be imitated to death. It was "Rick and Morty" before the actual Rick and Morty.
Anyway, I stopped keeping up for no particular reason and thus got to watch the nuclear fireball on /co/ from safely behind the blast shields. That's yet another massive bullet I've dodged by complete accident.
Might be worth a revisit if what @Basic_Blond_Boy says is true though.
The series has kind of blown me away so far. It's kind of sad. The show's intensity points to it being a limited series. Instead of Simon being involved, I wish the lych and Billy would have gotten a more indepth backstory.
I haven't actually seen it (and wouldn't get the context even if I did) so I'm not sure what passes for "intense" in current year but count your blessings if it's limited. We live in an age of shows kept on life support long past their prime; distorted and disgraced beyond all recognition. Sometimes dead is better.
Comics also have them end up with Finn after he turns 18 and becomes a buff chad.
I assumed you were just referencing that flash forward where PB states that age differences aren't a big deal to adults (boy did that quote age well!) and they embrace but no, I looked it up and whoever was in charge of the comic (both Ryan North and Christopher Hastings) apparently worked really hard to bail out the ship. Canon be damned. The funniest part is that they didn't change it after Bubbeline, they just made it a threesome. Canon wars behind the scenes are usually awful but this is hilarious.
I remember getting the first comic omnibus from my local Waterstones (along with Watchmen) and it was displayed a handwritten note of recommendation from the staff. I don't remember what it said other than it being - in retrospect - super cringe and having "totally mathmatical!" somewhere.
Ps. Anyone remember Bravest Warriors? That's another show that I accidentally dumped before the big reveal. How much did they fuck that one up?